bATtiny Guard is an advanced power module based on the ATtiny1616 microcontroller, designed to manage single-cell Li-Po battery systems efficiently. It offers comprehensive voltage monitoring through the use of an ADS1015 ADC and the ATtiny1616’s built-in ADC.

Key features include battery charging, current sensing, undervoltage and overvoltage protection, as well as temperature monitoring. With support for charging currents up to 2 A, and a low on-resistance output MOSFET. Measuring just 22.22 x 16.51 mm, it is ideal for high-power, small footprint applications. When paired with the demo kit PCB, it also functions as a convenient development board for the ATtiny1616.

Big Features, Tiny Board

bATtiny Guard’s core power management module is ideal for various applications where a single Li-Po battery is used. It is well suited for use in mobile devices where space is at a premium.

Native Arduino compatibility makes it easy to integrate into custom projects—bATtiny Guard offers developers a stable, flexible power system for whatever they’re prototyping. Its ATtiny1616 can be programmed for custom functionality, and the I2C interface lets the bATtiny send measurements, warning flags, or logs to a host microcontroller.

Features & Specifications

• 32-pin, 22.22 mm x 16.51 mm (0.87 x 0.65 in) package
• On/off behavior control
• 2 A single cell charger
• Single Li-Po cell powered
• 4+16 ADC channels
• Battery current measurement
• Brown-out detection/reset circuit
• Low on-resistance battery output MOSFET
• On-module temperature measurement
• I2C Interface (access to the integrated microcontroller or separate devices on the module)
• Arduino-compatible

Open Source

bATtiny Guard is open hardware, made available under the CERN-OHL-P-2.0 license. We also achieved OSHWA certification, verifying that the project fully conforms to open-source community standards.

On our GitHub, we have a datasheet, module and demo board schematics, the BoM for both boards, SMT assembly drawings, Eagle and KiCad footprints, as well as default code.

Interested in This Project?

You can sign up at the top of this page to be notified when the campaign launches and to receive other updates. We only send out relevant content, and you can unsubscribe at any time.